.i2-content {
  background-color: #000000;
  width: 100%;
  max-width: 1350px;
  height: 741px;
}
.i2-content .introduce3 {
  width: 33.1%;
  height: 33.3%;
  float: left;
  margin-left: 2px;
  margin-top: 1px;
  position: relative;
}
.i2-content .introduce3 .masks3 {
  width: 42%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.7);
  position: absolute;
  z-index: 100;
  top: 0;
  right: 0;
}
.i2-content .introduce3 .masks3 .masks3-text {
  width: 100%;
  height: 61%;
}
.i2-content .introduce3 .masks3 .masks3-text .h1 {
  width: 100%； height: 25%;
  font-size: 31px;
  font-weight: lighter;
  text-align: center;
  margin-top: 28px;
}
.i2-content .introduce3 .masks3 .masks3-text .h2 {
  width: 100%;
  height: 15%;
  font-size: 18px;
  font-weight: lighter;
  text-align: center;
  margin-top: -5px;
}
.i2-content .introduce3 .masks3 .masks3-text .h3 {
  width: 70%;
  height: 20%;
  background-color: #333333;
  margin: 0 auto;
  text-align: center;
  color: #fff994;
  font-size: 12px;
  line-height: 25px;
}
.i2-content .introduce3 .masks3 .masks3-text .h3:hover {
  background-color: red;
}
.i2-content .introduce3 .masks3 .masks3-text .tb {
  width: 77%;
  height: 30px;
  margin-left: 45px;
  margin-top: 10px;
}
.i2-content .introduce3 .masks3 .masks33 {
  width: 100%;
  height: 27.5%;
  background-color: white;
}
.i2-content .introduce3 .mask3:hover {
  background-color: white;
}
.i2-content .introduce {
  width: 33.1%;
  height: 33.3%;
  float: left;
  margin-left: 2px;
  margin-top: 1px;
  position: relative;
}
.i2-content .introduce .mask {
  width: 42%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.7);
  position: absolute;
  z-index: 100;
  top: 0;
  right: 0;
}
.i2-content .introduce .mask .mask-text {
  width: 100%;
  height: 61%;
}
.i2-content .introduce .mask .mask-text .h1 {
  width: 100%； height: 25%;
  font-size: 31px;
  font-weight: lighter;
  text-align: center;
  margin-top: 28px;
}
.i2-content .introduce .mask .mask-text .h2 {
  width: 100%;
  height: 15%;
  font-size: 18px;
  font-weight: lighter;
  text-align: center;
  margin-top: -5px;
}
.i2-content .introduce .mask .mask-text .h3 {
  width: 70%;
  height: 20%;
  background-color: #333333;
  margin: 0 auto;
  text-align: center;
  color: #fff994;
  font-size: 12px;
  line-height: 25px;
}
.i2-content .introduce .mask .mask-text .h3:hover {
  background-color: red;
}
.i2-content .introduce .mask .mask-text .tb {
  width: 77%;
  height: 30px;
  margin-left: 45px;
  margin-top: 10px;
}
.i2-content .introduce .mask .mask2 {
  width: 100%;
  height: 27.5%;
  background-color: white;
}
.i2-content .introduce .masks {
  width: 42%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.7);
  position: absolute;
  z-index: 100;
  top: 0;
  left: 0;
}
.i2-content .introduce .masks .mask-text {
  width: 100%;
  height: 61%;
}
.i2-content .introduce .masks .mask-text .h1 {
  width: 100%； height: 25%;
  font-size: 31px;
  font-weight: lighter;
  text-align: center;
  margin-top: 28px;
}
.i2-content .introduce .masks .mask-text .h2 {
  width: 100%;
  height: 15%;
  font-size: 18px;
  font-weight: lighter;
  text-align: center;
  margin-top: -5px;
}
.i2-content .introduce .masks .mask-text .h3 {
  width: 70%;
  height: 20%;
  background-color: #333333;
  margin: 0 auto;
  text-align: center;
  color: #fff994;
  font-size: 12px;
  line-height: 25px;
}
.i2-content .introduce .masks .mask-text .h3:hover {
  background-color: red;
}
.i2-content .introduce .masks .mask-text .tb {
  width: 77%;
  height: 30px;
  margin-left: 45px;
  margin-top: 10px;
}
.i2-content .introduce .masks .masks2 {
  width: 100%;
  height: 27.5%;
  background-color: white;
}
.i2-content .introduce .mask:hover {
  background-color: white;
}
.i2-content .introduce .masks:hover {
  background-color: white;
}
@media only screen and (max-width: 760px) {
  .i2-content {
    background-color: #000000;
    width: 100%;
    max-width: 760px;
    height: 741px;
  }
  .i2-content .introduce3 {
    width: 100%;
    height: 33.3%;
    float: left;
    margin-left: 2px;
    margin-top: 1px;
    position: relative;
  }
  .i2-content .introduce3 .masks3 {
    width: 42%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    position: absolute;
    z-index: 100;
    top: 0;
    right: 0;
  }
  .i2-content .introduce3 .masks3 .masks3-text {
    width: 100%;
    height: 61%;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h1 {
    width: 100%； height: 25%;
    font-size: 31px;
    font-weight: lighter;
    text-align: center;
    margin-top: 28px;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h2 {
    width: 100%;
    height: 15%;
    font-size: 18px;
    font-weight: lighter;
    text-align: center;
    margin-top: -4px;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h3 {
    width: 70%;
    height: 20%;
    background-color: #333333;
    margin: 0 auto;
    text-align: center;
    color: #fff994;
    font-size: 12px;
    line-height: 25px;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h3:hover {
    background-color: red;
  }
  .i2-content .introduce3 .masks3 .masks3-text .tb {
    width: 51%;
    height: 30px;
    margin-left: 45px;
    margin-top: 10px;
  }
  .i2-content .introduce3 .masks3 .masks33 {
    width: 100%;
    height: 27.5%;
    background-color: white;
  }
  .i2-content .introduce3 .mask3:hover {
    background-color: white;
  }
  .i2-content .introduce {
    width: 100%;
    height: 33.3%;
    float: left;
    margin-left: 2px;
    margin-top: 1px;
    position: relative;
  }
  .i2-content .introduce .mask {
    width: 42%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    position: absolute;
    z-index: 100;
    top: 0;
    right: 0;
  }
  .i2-content .introduce .mask .mask-text {
    width: 100%;
    height: 61%;
  }
  .i2-content .introduce .mask .mask-text .h1 {
    width: 100%； height: 25%;
    font-size: 31px;
    font-weight: lighter;
    text-align: center;
    margin-top: 28px;
  }
  .i2-content .introduce .mask .mask-text .h2 {
    width: 100%;
    height: 15%;
    font-size: 18px;
    font-weight: lighter;
    text-align: center;
    margin-top: -5px;
  }
  .i2-content .introduce .mask .mask-text .h3 {
    width: 70%;
    height: 20%;
    background-color: #333333;
    margin: 0 auto;
    text-align: center;
    color: #fff994;
    font-size: 12px;
    line-height: 25px;
  }
  .i2-content .introduce .mask .mask-text .h3:hover {
    background-color: red;
  }
  .i2-content .introduce .mask .mask-text .tb {
    width: 51%;
    height: 30px;
    margin-left: 45px;
    margin-top: 10px;
  }
  .i2-content .introduce .mask .mask2 {
    width: 100%;
    height: 27.5%;
    background-color: white;
  }
  .i2-content .introduce .masks {
    width: 42%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    position: absolute;
    z-index: 100;
    top: 0;
    left: 0;
  }
  .i2-content .introduce .masks .mask-text {
    width: 100%;
    height: 61%;
  }
  .i2-content .introduce .masks .mask-text .h1 {
    width: 100%； height: 25%;
    font-size: 31px;
    font-weight: lighter;
    text-align: center;
    margin-top: 28px;
  }
  .i2-content .introduce .masks .mask-text .h2 {
    width: 100%;
    height: 15%;
    font-size: 18px;
    font-weight: lighter;
    text-align: center;
    margin-top: -5px;
  }
  .i2-content .introduce .masks .mask-text .h3 {
    width: 70%;
    height: 20%;
    background-color: #333333;
    margin: 0 auto;
    text-align: center;
    color: #fff994;
    font-size: 12px;
    line-height: 25px;
  }
  .i2-content .introduce .masks .mask-text .h3:hover {
    background-color: red;
  }
  .i2-content .introduce .masks .mask-text .tb {
    width: 77%;
    height: 30px;
    margin-left: 45px;
    margin-top: 10px;
  }
  .i2-content .introduce .masks .masks2 {
    width: 100%;
    height: 27.5%;
    background-color: white;
  }
  .i2-content .introduce .mask:hover {
    background-color: white;
  }
  .i2-content .introduce .masks:hover {
    background-color: white;
  }
}
@media only screen and (min-width: 761px) and (max-width: 1024px) {
  .i2-content {
    background-color: #000000;
    width: 100%;
    max-width: 1024px;
    height: 741px;
  }
  .i2-content .introduce3 {
    width: 100%;
    height: 33.3%;
    float: left;
    margin-left: 2px;
    margin-top: 1px;
    position: relative;
  }
  .i2-content .introduce3 .masks3 {
    width: 42%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    position: absolute;
    z-index: 100;
    top: 0;
    right: 0;
  }
  .i2-content .introduce3 .masks3 .masks3-text {
    width: 100%;
    height: 61%;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h1 {
    width: 100%； height: 25%;
    font-size: 31px;
    font-weight: lighter;
    text-align: center;
    margin-top: 28px;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h2 {
    width: 100%;
    height: 15%;
    font-size: 18px;
    font-weight: lighter;
    text-align: center;
    margin-top: 10px;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h3 {
    width: 70%;
    height: 20%;
    background-color: #333333;
    margin: 0 auto;
    text-align: center;
    color: #fff994;
    font-size: 18px;
    line-height: 25px;
  }
  .i2-content .introduce3 .masks3 .masks3-text .h3:hover {
    background-color: red;
  }
  .i2-content .introduce3 .masks3 .masks3-text .tb {
    width: 43%;
    height: 30px;
    margin-left: 141px;
    margin-top: 25px;
  }
  .i2-content .introduce3 .masks3 .masks33 {
    width: 100%;
    height: 0;
    background-color: white;
  }
  .i2-content .introduce3 .mask3:hover {
    background-color: white;
  }
  .i2-content .introduce {
    width: 49.7%;
    height: 33.3%;
    float: left;
    margin-left: 2px;
    margin-top: 1px;
    position: relative;
  }
  .i2-content .introduce .mask {
    width: 42%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    position: absolute;
    z-index: 100;
    top: 0;
    right: 0;
  }
  .i2-content .introduce .mask .mask-text {
    width: 100%;
    height: 61%;
  }
  .i2-content .introduce .mask .mask-text .h1 {
    width: 100%； height: 25%;
    font-size: 31px;
    font-weight: lighter;
    text-align: center;
    margin-top: 28px;
  }
  .i2-content .introduce .mask .mask-text .h2 {
    width: 100%;
    height: 15%;
    font-size: 18px;
    font-weight: lighter;
    text-align: center;
    margin-top: -5px;
  }
  .i2-content .introduce .mask .mask-text .h3 {
    width: 70%;
    height: 20%;
    background-color: #333333;
    margin: 0 auto;
    text-align: center;
    color: #fff994;
    font-size: 12px;
    line-height: 25px;
  }
  .i2-content .introduce .mask .mask-text .h3:hover {
    background-color: red;
  }
  .i2-content .introduce .mask .mask-text .tb {
    width: 51%;
    height: 30px;
    margin-left: 45px;
    margin-top: 10px;
  }
  .i2-content .introduce .mask .mask2 {
    width: 100%;
    height: 27.5%;
    background-color: white;
  }
  .i2-content .introduce .masks {
    width: 42%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    position: absolute;
    z-index: 100;
    top: 0;
    left: 0;
  }
  .i2-content .introduce .masks .mask-text {
    width: 100%;
    height: 61%;
  }
  .i2-content .introduce .masks .mask-text .h1 {
    width: 100%； height: 25%;
    font-size: 31px;
    font-weight: lighter;
    text-align: center;
    margin-top: 28px;
  }
  .i2-content .introduce .masks .mask-text .h2 {
    width: 100%;
    height: 15%;
    font-size: 18px;
    font-weight: lighter;
    text-align: center;
    margin-top: -5px;
  }
  .i2-content .introduce .masks .mask-text .h3 {
    width: 70%;
    height: 20%;
    background-color: #333333;
    margin: 0 auto;
    text-align: center;
    color: #fff994;
    font-size: 12px;
    line-height: 25px;
  }
  .i2-content .introduce .masks .mask-text .h3:hover {
    background-color: red;
  }
  .i2-content .introduce .masks .mask-text .tb {
    width: 77%;
    height: 30px;
    margin-left: 45px;
    margin-top: 10px;
  }
  .i2-content .introduce .masks .masks2 {
    width: 100%;
    height: 27.5%;
    background-color: white;
  }
  .i2-content .introduce .mask:hover {
    background-color: white;
  }
  .i2-content .introduce .masks:hover {
    background-color: white;
  }
}
